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This paper discusses the information system box structural analysis and designs in three kinds of basic structure : black box, state machine and white box, and give each structure of definition, structure, counteract the language of BDL to describe.

1引言在结构化程序设计中我们通常采用顺序结构、选择结构和循环结构，它们可以互相嵌套。但在大型系统设计时，特别是在分析设计阶段，往往需要更高层次的抽象结构。

It is the trained, living human soul, cultivated and strengthened by long study and thought, that breathes the real breath of life into boys and girls and makes them human, whether they be black or white, Greek, Russian, or American....

受过训练，经过长期的研究与思考，有造诣的活灵魂，才能给男女儿童注入真正的生活气息，使他们成为真正意义上的人，不管他们是黑人还是白人，是希腊人、俄罗斯人还是美国人

And when this happens, when we allow freedom ring, when we let it ring from every village and every hamlet, from every state and every city, we will be able to speed up that day when all of God's children, black men and white men, Jews and Gentiles, Protestants and Catholics, will be able to join hands and sing in the words of the old Negro spiritual

中国的发展历史和美国社会的发展历史是完全不同的，那么在一个完全不同的基础上发展的两个国家，遇到的社会问题也是不同的，就好像我们形容人生没有彩排一样，一个国家的发展也是没有彩排的，&黑猫白猫&的理论提出固然出现了一些不良的社会现象，但是，那是在那样的历史条件下提出的。

Black men and white men, Jews and Gentiles, Protestants and Catholics, will be able to join hands and sing in the words of the old Negro spiritual, Free at last!

那时，上帝的所有孩子，黑人和白人，犹太教徒和非犹太教徒，耶稣教徒和天主教徒，将能携手同唱那首古老的黑人灵歌：终于自由了！

When we allow freedom to ring, when we let it ring from every village and hamlet, from every state and city, we will be able to speed up that day when all of God's children - black men and white men, Jews and Gentiles,Catholics and Protestants - will be able to join hands and to sing in the words of the old Negro spiritual

当我们让自由之声响彻之时，当我们让它从每一座村庄，从每一个州和每一座城市响起时，我们将能加速这一天的到来，那时，所有上帝的孩子们，黑人和白人，犹太人和异教徒们，基督徒和天主教徒们，将能手挽手，以那古老的黑人圣歌的歌词高唱

When we let freedom ring, when we let it ring from every village and every hamlet, from every state and every city, we will be able to speed up that day when all of God's children, black men and white men, Jews and Gentiles, Protestants and Catholics, will be able to join hands and sing in the words of the old Negro spiritual, Free at last!

当我们让自由之声响起来，让自由之声从每一个大小村庄、每一个州和每一个城市响起来时，我们将能够加速这一天的到来，那时，上帝的所有儿女，黑人和白人，犹太人和非犹太人，新教徒和天主教徒，都将手携手，合唱一首古老的黑人灵歌：终于自由了！

And when this happens, when we allow freedom ring, when we let it ring from every village and every hamlet, from every state and every city, we will be able to speed up that day when all of God's children, black men and white men, Jews and Gentiles, Protestants and Catholics, will be able to join hands and sing in the words of the old Negro spiritual: Free at last!

当我们让自由之声响起来，当我们让自由之声从每一个大小村庄，每一个州和每一个城市响起来时，我们将能够加速这一天的到来。这一天，上帝的所有儿女，黑人和白人，犹太教徒和非犹太教徒，新教徒和天主教徒，都将手携手，合唱一首古老的黑人灵歌：终于自由啦！

When we let freedom to ring, when we let it ring from every village and hamlet, from every state and every city, we will be able to speed up that day when all of God's children , black men and white men, Jews and Gentiles, Catholics and Protestants , will be able to join hands and sing in the words of the old Negro spiritual, Free at last!

当我们让自由之声响彻之时，当我们让它从每一座村庄，从每一个州和每一座城市响起时，我们将能加速这一天的到来，那时，所有上帝的孩子们，黑人和白人，犹太人和异教徒们，基督徒和天主教徒们，将能手挽手，以那古老的黑人圣歌的歌词高唱；终于自由了！

And when this happens, when we allow freedom ring, when we let it ring from every village and every hamlet, from every state and every city, we will be able to speed up that day when all of God's children, black men and white men, Jews and Gentiles, Protestants and Catholics, will be able to join hands and sing in the words of the old Negro spiritual

当我们让自由之声响彻之时，当我们让它从每一座村庄，从每一个州和每一座城市响起时，我们将能加速这一天的到来，那时，所有上帝的孩子们，黑人和白人，犹太人和异教徒们，基督徒和天主教徒们，将能手挽手，以那古老的黑人圣歌的歌词高唱

When we let freedom ring, when we let it ring from every village and every hamlet, from every state and every city, we will be able to speed up that day when all of Gods children, black men and white men, Jews and Gentiles, Protestants and Catholics, will be able to join hands and sing in the words of the old Negro spiritual, Free at last!

当我们让自由之声轰响，当我们让自由之声响彻每一个大村小庄，每一个州府城镇，我们就能加速这一天的到来。那时，上帝的所有孩子，黑人和白人，犹太教徒和非犹太教徒，耶稣教徒和天主教徒，将能携手同唱那首古老的黑人灵歌：终于自由了！

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。